Calibre
Organize ebooks, edit their metadata, convert formats, and transfer books to reading devices.GetGPL-3.0
Ebook readers
Open-source ebook readers for Mac that open EPUB, PDF and other formats, with libraries, highlights, notes and optional sync.
An ebook reader opens book files such as EPUB, MOBI and PDF and presents them with adjustable fonts, layouts and themes. Most also keep a library of your books and let you highlight passages and take notes.
Check which formats each reader supports, whether it can sync reading progress and annotations between devices, and whether it works with DRM-free files only. Some apps add library management and format conversion, others focus on a single reading view.
All Apps
5 free, open-source apps
Koodo Reader
A cross-platform ebook reader for EPUB, PDF, MOBI, comics and more, with optional cloud sync and backup.GetAGPL-3.0
Rapid Reader
A speed reader that shows EPUB, PDF, DOCX and web articles one word at a time, with a full-text view to resume anywhere.GetMIT
ReadAny
An e-book reader with highlights, notes, text-to-speech and optional AI chat and semantic search over your library.GetGPL-3.0+
Readest
A cross-platform ebook reader with a clean library, highlights and notes, and optional sync between devices.GetAGPL-3.0
